Reports have emerged in Russia that Iranian footballer Saeid Ezatolahi failed a drug test in out-of-competition testing shortly before the FIFA World Cup.
Medal winners in the sports of bowling, rowing and kickboxing has all been stripped of prizes won at last year's World Games in Wrocław after failing drugs tests, it has been confirmed.
Russia's World Cup star Denis Cheryshev has denied doping after his own father was reported as saying that he was injected with "growth hormone" in the build-up to the tournament.
FIFA have claimed that more than 2,700 drug tests have so far been carried out on players at the World Cup - with no positive tests recorded.
Spain's National Police have confirmed the arrest of six athletes for alleged involvement in an organisation distributing and selling performance enhancing drugs.
The new International Testing Agency (ITA) - billed as "a major player in the global fight against doping" - officially started its operations in Lausanne today.
Turkey, Armenia and Azerbaijan will have their doping-related suspensions from international weightlifting competitions lifted early, it has been announced today.
Kiefer Ravena, a four-time Southeast Asian Games gold medallist and one of the best-known basketball players from The Philippines, has been suspended for 18 months after testing positive for three banned substances.
Britain's Chris Froome has insisted there should be "no question at all" on the credibility of his Giro d'Italia triumph amid the controversy surrounding his participation at the race after he failed a drugs test last year.
Liam Morgan: Chris Froome and how suspicion continues to be prevailing response to sporting greatness
The level of suspicion which accompanies magnificent sporting feats these days was there for all to see after Chris Froome’s performance during a dramatic 19th stage of the Giro d’Italia.
Russian Sports Minister Pavel Kolobkov today denied that Russia has backed down and accepted the findings of the McLaren Report, despite signing a letter sent to the World Anti-Doping Agency (WADA) which appears to go further than ever before towards doing so.
American modern pentathlete Logan Storie is free to return to competition on Thursday (May 24) after serving a backdated 15-month doping ban which has only just been announced.
Britain's Sports Minister Tracey Crouch has claimed the UK Government will look to push the World Anti-Doping Agency (WADA) to make the Therapeutic Use Exemptions (TUE) process more transparent.
A former Indian Olympic sprinter has called for the country to do more to eradicate doping in the build-up to this year's Asian Games in Jakarta and Palembang.
Sweden's National Sports Association has reported Russian-linked hacking group Fancy Bears to the police after they published the names of athletes who had received asthma medication.